Veneer and method of manufacturing



. Patented Mar. 6, 1928.

UNITE-D1" STATES PATENT orl-"lca.

No Drawing. Application filed Kay 14,

This invention relates to improvements in veneer strips made ofpaper or fabr c 1m pregnated with a phenolic or other resin of the class which is transformed under pressure and elevated temperatures to a hard, in-' soluble, and infusible condition.

The invention further relates to improvements in the methods of manufacturing these veneer strips.

' Prior to my invention it had been diiiicult, if not impossible, to produce satisfactory veneer of the above stated type. lt-was diflicult, for example, to produce the thin strips with a uniform high finish due .to unavoidable irregularities-or lack of parallel-ism in the plates of the press in which the veneer was manufactured. Also the under sides of the veneer strips as previously manufactured Were so smooth and impervious to glue or other adhesive that effective adherence of the strip to the base surfaces could not be obtained.

It is the principal objects of the present invention to overcome these defects and to provide a veneer of the stated type which shall be entirely practicable.

In practicing my invention, I may em ploy as a base material a laminated paper board such as made 011 a cylinder machine. Preferably the paper stock from which the board is made is short and well beaten so that the cohesion between the respective laminations is at a minimum. Or I may employ a base-board built up of a number of sheets of paper so united thatthere is little or no coherence between the sheets. Although it is practicable to practice the invention by using a base body consisting of a meredisunited stack of paper sheets, I prefer to employ a laminated built-up board of the type first mentioned.

Against one or both sides of this board or "stack, 1 place one or a number of sheets of paper or other suitable fibrous material mpregnated with a synthetic or other resin of the stated type, and the resulting pile 15 then pressed between plates in a suitable press'in' theusual manner of treating such materials in order to transform the resin to its final hard condition. It will, of course,

7 be understood that any suitable method of impregnating the sheets with the resin may PENNSYLVANIA, ASSIGNOR TO mlmonzo sra'rn PENNSYLVANIA, CORPORATION DELA- VENEER AND METEOD OF MANUFACTURING.

1926. Serial No. 109,179

be' employed, this operation being well understood in the art. 1

After the. application of pressure and heat, the resin-impregnated sheets will have been found to adhere to the faces of the baseboard or to the outer sheets of the unim pregnatcd stack, and in either event the impregnated sheets in which the gum is in its hard final condition may be stripped off the board or separated from the stack, with the result that a veneer sheet is provided which maybe very thin yet nevertheless possesses a high uniform finish on one side and a papery absorbent finish 0n the other side suitable for gluing, this paper finish being obtained by reason of the adherence to the face of the impregnated sheet of some of the paper base.

, 7 It will be noted that although the presses may not be sufiiciently accurateto insure a uniformly high finish on all parts of the veneer strips when these strips are compressed alone and without thebasc-board' or other, filling, by reason of their thinness which may, for example, be .005, the base-board compensates for the irregularities in the press to such an extent that the variations are automatically taken care of, the baseboard or stack acting as' a cushion com ensating for all unevenness in the plate an affording approximately uniform pressure over the entire surface of the impregnated sheets. 1

. Although it ispreferred to employ a base board of laminated and easily delaminated construction, since this provides simple means for affording the aforesaid papery finish of a substantially uniform thickness, it will be apparent that any type of board of a suitable fibrous or absorbent material, so constructed that apart thereof will adhere to theveneer strips when the latter" are removed, will suiiice and there is to be no limitation in this respect.

In practice, the veneer strips adhering to one or both faces of the base-board may be stored or shipped without danger of breakage, and may be stripped from the boards as rei uired. Or they may bee-stripped immediateciindition for use. In any event a veneer is provided having all the required characteristics of a completely praeticaple article.

from the boards and sold or shipped in" The veneer strips may be grained to imitate wood veneer, and may be given any desired finish, either highly polished or matte. Where the graining is marked on the paper sheets prior to their impregnation, the markings are in effect inlaid in the veneer and accordingly are .very durable.

I claim:

1. A thin veneer sheet impregnated with a hardened resin, and fibres embedded in the resin and exposed on one face of the sheet to form an integral fibrous surface.

2. Athin veneer sheet impregnated with a hardened resin and having on one face a substantially uniform high finish, and fibres cemented by said resin to the other face of the sheet and forming an integral fibrous surface.

3. The method of manufacturing thin veneer sheets, which consists in treating a fibre sheet with a resinous binder, laying said sheet against a face of a relatively thickbody of fibrous material, hardening the binder under conditions such that at least a portion of said fibrous body adheres to the face of the sheet, and thereafter removing the sheet from said body with an adhering portion of the latter forming on one face of the sheet a fibrous surface.

4. The method of manufacturing thin veneer sheets, which consists in taking a fibre sheet, impregnating said sheet with a synthetic resin in its soluble and fusible state, applying said impregnated sheet to a relatively thick body of fibrous material, applying pressure and heat to convert the resin to its final hard and infusible state, and separating the sheet from the said fibre body with an adhering portion of the latter forming on one face of the sheet a fibrous surface. i

5. The method of manufacturing thin veneer sheets, which consists in impregnating a fibre sheet with a synthetic resin in its soluble and fusible condition, applyin the impregnated sheet to the face of a aminated and easily delaminated fibre body, converting the resin to its hard and infusible state under conditions such that the said laminated body adheres to the face of the sheet, and separating the sheet from the body with an adhering ortion of the latter forming on one face of the sheet a fibrous surface.

6. In the manufacture of thin veneer sheets, the method of obtaining a substantiall uniform high finish on the finished pro act, which consists in treating a fibre sheet with a resinadapted to be hardened by the application of heat and pressure, laying the treated sheetagainst a relativey thick and resilient body, and applying heat and pressure to harden the resin.

- 7. As a new article of manufacture, a body of'fibrous material united to form a readily disintegrated board, said board having on one face thereof a relatively thin sheet impregnated with a hardened, resin, said impregnated sheet being secured to'the saidboard by means of-the resin with which it is impregnated and by reason of the physical characteristics of said board bein readily detachable therefrom, with an adhering portion of the board forming on one face of the sheet a fibrous surface.

JAMES MCINTOSH. 

